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US 7,924,368 B2Granted
Diffuse multilayer optical assembly
Assignee3M Innovative Properties Company
InventorsRyan T. Fabick, Stephen J. Etzkorn, Mark D. Gehlsen
Life of this patent
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Abstract
An optical assembly includes a light diffusing layer attached to a reflective polarizing layer. An intermediate region between the light diffusing layer and the reflective polarizing layer includes an intermediate structure that defines voids between the light diffusing layer and the reflective polarizing layer.
Claims13
An optical assembly comprising:
- a light diffusing layer;
- a reflective polarizing layer attached to the light diffusing layer;
- and
- an intermediate region between the light diffusing layer and the reflective polarizing layer, the intermediate region including an intermediate structure that defines voids between the light diffusing layer and the reflective polarizing layer, and wherein the intermediate structure comprises a non-uniform surface on the reflective polarizing layer that is formed by a plurality of topographical features that extend into the intermediate region, wherein adjacent topographical features define the voids;
- wherein the non-uniform surface on the reflective polarizing layer comprises an average roughness of about 0.5 to 10 μm.
2 more elements
An optical display assembly comprising:
- a light gating device;
- a light source;
- and
- an optical element disposed between the light source and the light gating device, the optical element comprising:
- a light diffusing layer;
- a reflective polarizing layer attached to the light diffusing layer;
- and
- an intermediate region between the light diffusing layer and the light management layer, the intermediate region including an intermediate structure that defines voids between the light diffusing layer and the reflective polarizing layer, and wherein the intermediate structure comprises a non-uniform surface on the reflective polarizing layer that is formed by a plurality of topographical features that extend into the intermediate region, wherein adjacent topographical features define the voids;
- wherein the non-uniform surface on the reflective polarizing layer comprises an average roughness of about 0.5 to 10 μm.
6 more elements
Dependencies are inferred from the claim text.